The last of the Neanderthals may have died out tens of thousands of years ago, but large stretches of their genetic code live on in people today. Though many of us can claim only a handful of Neanderthal genes, when added together, the human...

WASHINGTON — Sexual encounters with archaic humans like the Neanderthals produced children who inherited key genes that have helped modern humans fight illness and disease, said a US study published Thursday. “The cross-breeding...